In 'Twilight Suffers from PTSD Fanfiction', a common theme is the change in her behavior. Due to PTSD, Twilight may become more withdrawn and less social. She might avoid places or people that remind her of the trauma. Another theme could be the impact on her powers. Her vampiric abilities might be affected by her mental state, like having difficulty controlling her speed or strength when she's in the midst of a PTSD episode. And sometimes, the theme of redemption might be there too, as she tries to make up for things she might have done wrong during her PTSD - affected state.
Well, a frequent theme is probably the manifestation of PTSD symptoms. For example, Twilight might experience nightmares that are vivid and terrifying, and these could be a big part of the fanfiction. There could also be a theme of isolation as she tries to deal with her PTSD on her own. She may push away those who care about her, thinking she's protecting them from her own instability. And then, there might be a theme of self - discovery as she learns more about herself through this difficult time.
One possible plotline could be Twilight Sparkle having PTSD from a past battle or a traumatic event in Equestria. This might cause her to have nightmares and struggle with her magic. She could then go on a journey to overcome her PTSD, perhaps with the help of her friends.
I haven't come across a particular 'Twilight Sparkle suffers from PTSD fanfiction' myself. However, if you join My Little Pony fan communities, such as on Reddit or Discord, you can ask the members there. They are often very knowledgeable about different types of fanfictions and might be able to point you in the right direction.
Edward is often involved. Since he's so close to Twilight, he would be there to support her or sometimes be a source of conflict as he tries to help in his own way but might not always understand what she's going through. Bella's family, like Charlie, could also be main characters. Charlie might notice the changes in Twilight and try to figure out what's wrong. And then, her vampire friends like Alice could play a significant role. Alice might use her ability to foresee things related to Twilight's PTSD, either to help or sometimes make things more complicated.
One common theme could be Percy's struggle to fit in at school while dealing with PTSD. Maybe he has flashbacks during class or has trouble making friends because of his trauma.
One common theme is her past traumas. For example, the events from the Battle of Hogwarts can resurface in her nightmares, causing her distress. Another theme is her insecurities. Hermione may be brilliant, but she has her own self - doubts, and these can be magnified in her dreams, making her feel even more vulnerable.
Another theme is the exploration of his past traumas. Writers usually dig into the events that caused Harry's PTSD, such as the death of his parents and his battles with Voldemort. This helps readers understand the root of his condition better.
Well, a common theme is the isolation he feels. He might feel that no one truly understands what he has been through, so he withdraws from his friends in some fanfictions. Flashbacks are also very common. For instance, when he sees something that reminds him of a past battle or a death, he gets sucked into a flashback. And there's often the theme of self - blame. Harry might blame himself for not being able to save everyone in the wars, which is a classic PTSD - related theme.
A frequent theme is Ruby's nightmares. These nightmares can be intense and often wake her up in a cold sweat. The fanfictions may show how she then has trouble getting back to sleep, fearing the nightmares will return. Also, there's the theme of her self - blame. Ruby might think that she could have prevented the traumatic events, which adds to her mental anguish.
One common theme is trauma recurrence. The characters keep reliving the traumatic event through flashbacks, like a war veteran hearing a helicopter sound and being thrust back into combat memories.
Another theme is the struggle. There is a constant battle between the past traumas and the new relationship. In some novels, the PTSD symptoms like flashbacks and anxiety can put a strain on the romance, which is a very real and often explored aspect.